byte led1 = 15;
byte led2 = 2;
byte led3 = 4;
byte led4 = 16;
byte led5 = 17;
byte led6 = 5;
byte led7 = 18;
byte led8 = 19;
byte led9 = 21;
byte led10 = 22;

//pin sensor ultrasonik 
byte trigPin1 = 13;
byte echoPin1 = 12;
#define kecepatanSuara 0.034
//#define digunakan untuk membuat sebuah konstanta

float jarakcm1;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("ESP32 Water level");

  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(led6, OUTPUT);
  pinMode(led7, OUTPUT);
  pinMode(led8, OUTPUT);
  pinMode(led9, OUTPUT);
  pinMode(led10, OUTPUT);
}

void loop() {
  // ambil jarak dari sensor
  unsigned long durasi = 0;
  //memerintahkan sensor ultrasonik
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);

//mencari durasi waktu
  durasi = pulseIn(echoPin1,HIGH);

  //menghitung jarak
  jarakcm1 = durasi * kecepatanSuara / 2;

  Serial.print("Jarak = ");
  Serial.println(jarakcm1);

  //matikan semua LED
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
  digitalWrite(led6, LOW);
  digitalWrite(led7, LOW);
  digitalWrite(led8, LOW);
  digitalWrite(led9, LOW);
  digitalWrite(led10, LOW);

  //jika jarak kurang dari sama dengan 10
  if(jarakcm1<=10){
    digitalWrite(led1, HIGH);
  }
  if(jarakcm1>10 && jarakcm1<=20){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
  }
  if(jarakcm1>20 && jarakcm1<=30){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
  }
  if(jarakcm1>30 && jarakcm1<=40){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
  }
  if(jarakcm1>40 && jarakcm1<=50){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
  }
  if(jarakcm1>50 && jarakcm1<=60){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
    digitalWrite(led6, HIGH);
  }
   if(jarakcm1>60 && jarakcm1<=70){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
    digitalWrite(led6, HIGH);
    digitalWrite(led7, HIGH);
  }
  if(jarakcm1>70 && jarakcm1<=80){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
    digitalWrite(led6, HIGH);
    digitalWrite(led7, HIGH);
    digitalWrite(led8, HIGH);
  }
  if(jarakcm1>80 && jarakcm1<=90){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
    digitalWrite(led6, HIGH);
    digitalWrite(led7, HIGH);
    digitalWrite(led8, HIGH);
    digitalWrite(led9, HIGH);
  }
  if(jarakcm1>90){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
    digitalWrite(led6, HIGH);
    digitalWrite(led7, HIGH);
    digitalWrite(led8, HIGH);
    digitalWrite(led9, HIGH);
    digitalWrite(led10, HIGH);
  }

  delay(1000); // this speeds up the simulation
}